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Reg D 506(c)TRL43.2–4.8Tier IAnnounced

Vanguard Supercritical

Vanguard Supercritical

Water above its critical point, 45% thermal efficiency, and no steam generator. Announced, not yet open.

Above 22 MPa and 374 °C water stops distinguishing between liquid and gas, which means a reactor can drive a turbine directly with no steam generator and no boiling crisis to design around. Thermal efficiency rises from roughly 33% to 45%. The unresolved problem is materials: very few alloys tolerate supercritical water, radiation and time simultaneously.

James River Technology Park · Lynchburg, VAPre-applicationEscrow: Meridian Trust, N.A.
TRL 4 of 9, band 3.2 to 4.8, signed by Dr. Samuel Adeyemi, PhD Nuclear Engineering; ASME Section III reviewer, on Jun 25, 2026.See the evidence it rests on

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Released to the issuerCommitted, held in escrowRemaining
Minimum
$25,000

$1,000 per unit

Target coupon
5.00%

Annual, fixed

Term
5 yr
Investors
0

Closes June 30, 2027 · 290 days remaining

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Use of proceeds

  • 44%Integral supercritical test loop
  • 30%Cladding and structural materials qualification
  • 16%Pre-application engagement
  • 10%Team and working capital

The issuer

Supercritical water at 25 MPa, which raises thermal efficiency to roughly 45% and removes the steam generator from the design entirely.

Legal name
Vanguard Supercritical Water Reactor Corporation
Entity
Delaware C-corporation
Jurisdiction
Virginia
Founded
2021

  • Peter NowakowskiChief Technology Officer

    Supercritical fluid thermal hydraulics and materials. Formerly with a fossil supercritical boiler program.